MAX13051ESA+ Maxim Integrated Products, MAX13051ESA+ Datasheet - Page 8

• Manufacturer Part Number: MAX13051ESA+
• Description: IC TRANSCEIVER CAN 8-SOIC
• Manufacturer: Maxim Integrated Products
• Type: Transceiverr

Specifications of MAX13051ESA+

• Number Of Drivers/receivers: 1/1
• Protocol: CAN
• Voltage - Supply: 4.75 V ~ 5.25 V
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The MAX13051 features ±80V fault protection. This
extended voltage range of CANH and CANL allows
communication in high-voltage systems up to 80V.
The MAX13051 can achieve transmission rates of up to
1Mbps when operating in high-speed mode. To oper-
ate in high-speed mode, short RS to ground.
Connect a resistor from RS to ground to select slope-
control mode (Table 1). In slope-control mode, CANH
and CANL slew rates are controlled by the resistor,
(16kΩ ≤ R
GND. Controlling the rise and fall slopes reduces high-
frequency EMI and allows the use of an unshielded-
twisted pair or a parallel pair of wires as bus lines. The
slew rate can be approximated using the formula
below:
±80V Fault-Protected Can Transceiver
with Autobaud
Figure 3. MAX13051 Functional Diagram
8
_______________________________________________________________________________________
RS
≤ 200kΩ), connected between RS and
AUTOBAUD
Detail Description
RXD
TXD
RS
±80V Fault Tolerant
Operating Modes
Slope-Control Mode
V
CC
High-Speed Mode
AUTOBAUD
CIRCUITRY
ENABLE
AND SLOPE-
CONTROL
TIMEOUT
MUX
MODE
WAKE-UP MODE
CONTROL
WAKE-UP
FILTER
where, SR is the desired slew rate and R
In standby mode (RS = high), the transmitter is
switched off and the receiver is switched to a low-cur-
rent/low-speed state. The supply current reduces to
15µA to detect and recognize a wake-up event on the
bus line. During standby mode, the bus line is moni-
tored with a low-differential comparator. Once the com-
parator detects a dominant bus level greater than
t
The MAX13051 logic-controlled autobaud input allows
a microcontroller to compute the incoming baud rate
without destroying CAN protocol communication. When
operating in autobaud mode, TXD is looped back to
RXD without applying a differential signal at CANH and
CANL. See Figure 4.
MAX13051
WAKE
SHUTDOWN
THERMAL
DRIVER
, RXD pulls low.
V
CC
SR V
(
CANH
CANL
GND
/ µ
s
)
≈
R
250
RS
Autobaud Mode
Standby Mode
RS
is in kΩ.